My company has a PIX 515 and will upgrade the software to 6.2. And I also want to use PDM to config the firewall easily. I know the PDM is included in a new pix if you buy software 6.2. But now I upgrade the firewall. I need to intall the PDM in it. But I don't know if the PDM is free and if I can install it when I can get the PDM image. Can any one tell me about it?